CHECK VALVES 300 PSI SWING CHECK VALVE, FLANGED ENDS MODEL: SFL-SC-300-F 350 PSI SWING CHECK VALVE MODELS: SFL-SC-350-F / SFL-SC-350-G / SFL-SC-350-FG / SFL-SC-350-GF 350PSI RISER CHECK VALVE MODEL: SFL-SC-350-F / SFL-SC-350-G / SFL-SC-350-FG / SFL-SC-350-GF ALARM CHECK VALVE MODEL: SFL-ACV RETARDING CHAMBER MODEL: SFL-RET WATER MOTOR ALARM GONG MODEL: SFL-WMAG